<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Catalog
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Catalog product tier price backend attribute model
 *
 * @category   Mage
 * @package    Mage_Catalog
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Catalog_Model_Product_Attribute_Backend_Tierprice
    extends Mage_Catalog_Model_Product_Attribute_Backend_Groupprice_Abstract
{
    /**
     * Retrieve resource instance
     *
     * @return Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Attribute_Backend_Tierprice
     */
    protected function _getResource()
    {
        return Mage::getResourceSingleton('catalog/product_attribute_backend_tierprice');
    }

    /**
     * Retrieve websites rates and base currency codes
     *
     * @deprecated since 1.12.0.0
     * @return array
     */
    public function _getWebsiteRates()
    {
        return $this->_getWebsiteCurrencyRates();
    }

    /**
     * Add price qty to unique fields
     *
     * @param array $objectArray
     * @return array
     */
    protected function _getAdditionalUniqueFields($objectArray)
    {
        $uniqueFields = parent::_getAdditionalUniqueFields($objectArray);
        $uniqueFields['qty'] = $objectArray['price_qty'] * 1;
        return $uniqueFields;
    }

    /**
     * Error message when duplicates
     *
     * @return string
     */
    protected function _getDuplicateErrorMessage()
    {
        return Mage::helper('catalog')->__('Duplicate website tier price customer group and quantity.');
    }

    /**
     * Whether tier price value fixed or percent of original price
     *
     * @param Mage_Catalog_Model_Product_Type_Price $priceObject
     * @return bool
     */
    protected function _isPriceFixed($priceObject)
    {
        return $priceObject->isTierPriceFixed();
    }
}
